pp.32-66

Key Term Review Worksheet Use your vocab to complete the worksheet. Staple it into your journal

Let’s play 20 Questions Think of an object Your partner will ask you “yes or no” questions based on the object’s size, shape, color, texture, odor, and weight. You have 2 minutes Let’s discuss What’s one thing that ALL of these objects have in common………..

Notes Matter is…… Properties of matter Study of matter and the change it undergoes is called ____________________. How matter changes and reacts depends on what it is made of. A single kind of matter that is pure is called a substance. Every form of matter has 2 kinds of properties--- physical and chemical.

Define and list 3 common examples of physical properties. Physical changes do not alter the substance, only its appearance. Look on p. 51 for examples of physical change. Define and list 3 examples of chemical properties. Chemical changes produce a new substance. Look on p. 52 and list some examples of chemical change.

What is an element? Elements are the most simple substances, each element can be identified by its specific physical and chemical properties Atoms- a basic particle from which all elements are made. Atoms are surrounded by a “ cloud” of negativity. Particles of Elements- Atoms

When Atoms Combine Atoms of most elements have the ability to combine with other atoms. Molecules are groups of 2 or more atoms held together by a chemical bond.

A compound is a pure substance made of two or more elements chemically combined in a set ratio. When elements are chemically combined, they form compounds having properties that are different from those of the uncombined elements.

Mixtures are made up of two or more substances Parts of mixture are not combined in set ratio

Heterogeneous In a heterogeneous mixture, you can see the different parts. Example: The damp soil described above is one example of a heterogeneous mixture. So a salad. Is so evenly mixed you cant even see the different parts Cake Homogeneous

Look at the examples provided and determine whether they are examples of chemical or physical change. Place them under the appropriate heading. Complete the worksheet and turn in Clean up

Weight vs. Mass: Weight is a measure of the force of gravity Mass is a measure of the amount of matter. Unlike weight, mass does not change with location, even when the force of gravity on an object changes. To measure the properties of matter, scientists use the International System of Units (SI units).

Volume Amount of space the matter takes up Measured in Liter (L), milliliter (mL), and cubic centimeter (cm 3 ) Volume = Length x width x Height Density Relates the mass of a material in a given volume Density= Mass / volume Density is a physical property of a substance and can be used to identify an unknown substance.

Matter cannot be created nor destroyed during a chemical or physical change

TE: total energy of all the particles in an object. Temperature is related to the amount of thermal energy an object has. TE always flows from warmer matter to cooler matter Endothermic: energy is taken in (ice melting) Exothermic: energy given off (fire warming your hands)

Kinetic Potential Chemical Electromagnetic Electrical Thermal